Time pitch algorithm settings
The constants that define the values for the time pitch algorithms.
Overview
In iOS and macOS, the default algorithm for playback for apps linked on or after iOS 15 or macOS 12 is timeDomain.
For iOS versions prior to iOS 15, the default value is lowQualityZeroLatency, and for macOS versions prior to macOS 12, the default value is spectral.
The default value for export and other offline processing is spectral.
For scaled audio edits, such as when the timeMapping of an AVAssetTrackSegment is between timeRanges of unequal duration, it’s important to choose an algorithm that supports the full range of edit rates present in the source media. The pitch algorithm spectral is often the best choice due to the highly inclusive range of rates it supports, assuming that it’s desirable to maintain a constant pitch regardless of the edit rate. If it’s desirable to allow the pitch to vary with the edit rate, varispeed is the best choice.